Auto freeze frame display for intrusion monitoring system
First Claim
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1. In a video surveillance and intrusion alarm system of the type comprising means for generating a plurality of alarm signals, each associated with a respective zone;
- and means for generating a plurality of video signals, each associated with a respective zone;
the improvement comprising;
at least one video image digitizer means for storing on an ongoing basis a plurality of sets of digitized still video images, each set associated with a respective one of the video signals, each stored digitized still video image corresponding to a respective image time;
controller means responsive to thee alarm signals for automatically selecting at least one of the stored digitized still video images for display, said at least one selected digitized still video image corresponding for each of the alarm signals to the zone associated with that alarm signal, and said at least one selected digitized still video image corresponding to an image time prior to the time the respective alarm signal was received by the controller means; and
display means coupled to the at least one video image digitizer means for displaying the at least one selected digitized still video image, thereby providing a view of the zone associated with an alarm signal as the zone appeared at a time prior to the time when the alarm signal was received by the controller means.
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Abstract
A video monitoring system responds to an intrusion alarm by automatically presenting still video images of the zone of the alarm at or about the time of the alarm. The operator can control magnification and contrast to enhance the displayed image. In one system the displayed images are images taken at times both before and after the alarm was received by the monitoring system.
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Citations
16 Claims
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1. In a video surveillance and intrusion alarm system of the type comprising means for generating a plurality of alarm signals, each associated with a respective zone;
- and means for generating a plurality of video signals, each associated with a respective zone;
the improvement comprising;at least one video image digitizer means for storing on an ongoing basis a plurality of sets of digitized still video images, each set associated with a respective one of the video signals, each stored digitized still video image corresponding to a respective image time; controller means responsive to thee alarm signals for automatically selecting at least one of the stored digitized still video images for display, said at least one selected digitized still video image corresponding for each of the alarm signals to the zone associated with that alarm signal, and said at least one selected digitized still video image corresponding to an image time prior to the time the respective alarm signal was received by the controller means; and display means coupled to the at least one video image digitizer means for displaying the at least one selected digitized still video image, thereby providing a view of the zone associated with an alarm signal as the zone appeared at a time prior to the time when the alarm signal was received by the controller means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- and means for generating a plurality of video signals, each associated with a respective zone;
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9. In a video surveillance and intrusion alarm system of the type comprising a plurality of sensor systems operative to generate a plurality of alarm signals, each associated with a respective zone;
- and a plurality of cameras operative to generate a plurality of video signals, each associated with a respective zone;
the improvement comprising;at least one video image digitizer operative to store on an ongoing basis a plurality of sets of digitized still video images, each set associated with a respective one of the video signals, each stored digitized still video image corresponding to a respective image time; a controller responsive to the alarm signals to automatically select at least one of the stored digitized still video images for display, said at least one selected digitized still video image corresponding for each of the alarm signals to the zone associated with that alarm signal, and said at least one selected digitized still video image corresponding to an image time prior to the time the respective alarm signal was received by the controller; and a display coupled to the at least one video image digitizer to display the at least one selected digitized still video image, thereby providing a view of the zone associated with an alarm signal as the zone appeared at a time prior to the time when the alarm signal was received by the controller. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- and a plurality of cameras operative to generate a plurality of video signals, each associated with a respective zone;
Specification